swap 3 Number Without Temp

package com.company;

public class Algorithm {
    int a;
    int b;
    int c;

    Algorithm swap(Algorithm algorithm) {
        System.out.println("a = " + algorithm.a + " b = " + algorithm.b + " c = " + algorithm.c);
        algorithm.a = algorithm.a + (algorithm.b + algorithm.c);
        algorithm.b = algorithm.a - (algorithm.b + algorithm.c);
        algorithm.c = algorithm.a - (algorithm.b + algorithm.c);
        algorithm.a = algorithm.a - (algorithm.b + algorithm.c);
        System.out.println("a = " + algorithm.a + " b = " + algorithm.b + " c = " + algorithm.c);
        return algorithm;
    }
}

package com.company;

import org.junit.jupiter.api.Assertions;
import org.junit.jupiter.api.Test;

public class AlgorithmTest {
    @Test
    void swap1() {
        Algorithm algorithm = new Algorithm();
        algorithm.a = 10;
        algorithm.b = 20;
        algorithm.c = 30;
        Algorithm swap = algorithm.swap(algorithm);
        Assertions.assertEquals(30, swap.a);
        Assertions.assertEquals(10, swap.b);
        Assertions.assertEquals(20, swap.c);
    }
}

plugins {
    id 'java'
}

group 'org.example'
version '1.0-SNAPSHOT'

repositories {
    mavenCentral()
}

dependencies {
    testImplementation('org.junit.jupiter:junit-jupiter:5.6.2')
}

test {
    useJUnitPlatform()
}